# facet_grid() fails if passed both a formula and a vars() `rows` must be "NULL" or a `vars()` list if `cols` is a `vars()` list # can't pass formulas to `cols` `cols` must be "NULL" or a `vars()` specification # facet gives clear error if Faceting variables can only appear in `rows` or `cols`, not both. i Duplicated variables: "x" --- `rows` must be "NULL" or a `vars()` list if `cols` is a `vars()` list i Did you use `%>%` or `|>` instead of `+`? --- A grid facet specification can't have more than two dimensions --- `cols` must be "NULL" or a `vars()` specification # at least one layer must contain all facet variables in combine_vars() At least one layer must contain all faceting variables: `letter` x Plot is missing `letter` Layer is missing `letter` # combine_vars() generates the correct combinations At least one layer must contain all faceting variables: `b` and `c` x Plot is missing `c` x Layer 1 is missing `b` --- Faceting variables must have at least one value # validate_facets() provide meaningful errors Please use `vars()` to supply facet variables --- Please use `vars()` to supply facet variables i Did you use `%>%` or `|>` instead of `+`? # check_layout() throws meaningful errors Facet layout has a bad format. It must contain columns `PANEL`, `SCALE_X`, and `SCALE_Y`
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